The Experts below are selected from a list of 38547 Experts worldwide ranked by ideXlab platform
Bimal K. Banik - One of the best experts on this subject based on the ideXlab platform.
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a remarkable iodine catalyzed protection of Carbonyl Compounds
ChemInform, 2005Co-Authors: Bimal K. Banik, Marin Chapa, Jocabed Marquez, Magda CardonaAbstract:We report here a remarkably simple molecular iodine-catalyzed protection method for various Carbonyl Compounds as ketals in a general reaction. The iodine-catalyzed reaction of mandelic acid and lactic acid with several aldehydes has furnished a highly diastereoselective synthesis of cis and trans dioxolanones.
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samarium n bromosuccinimide induced reductive dimerization of Carbonyl Compounds
Tetrahedron Letters, 2005Co-Authors: Bimal K. Banik, Susanta Samajdar, Indrani Banik, Rogelio CuellarAbstract:Stereoselective reductive coupling of Carbonyl Compounds has been achieved using samarium/N-bromosuccinimide in methanol. The combination of these agents has proved a powerful addition to the arsenal of samarium-based reductants currently utilized.
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a remarkable bismuth nitrate catalyzed protection of Carbonyl Compounds
Tetrahedron Letters, 2003Co-Authors: Neeta Srivastava, Swapan K Dasgupta, Bimal K. BanikAbstract:Abstract Bismuth nitrate has been found to be an outstanding catalyst for the protection of Carbonyl Compounds as acetal, ketal, mixed ketal and thioketal with an excellent yield.
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a new molecular iodine catalyzed acetalization of Carbonyl Compounds
Synlett, 2002Co-Authors: Manas K Basu, Susanta Samajdar, Frederick F Becker, Bimal K. BanikAbstract:A new and facile molecular iodine-catalyzed acetalization of Carbonyl Compounds has been developed. Useful selectivity has also been demonstrated.
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a new molecular iodine catalyzed thioketalization of Carbonyl Compounds selectivity and scope
Tetrahedron Letters, 2001Co-Authors: Susanta Samajdar, Manas K Basu, Frederick F Becker, Bimal K. BanikAbstract:Abstract A new molecular iodine-catalyzed thioketalization of Carbonyl Compounds has been developed.
N Moreira - One of the best experts on this subject based on the ideXlab platform.
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development and optimization of a hs spme gc ms methodology to quantify volatile Carbonyl Compounds in port wines
Food Chemistry, 2019Co-Authors: Victor De Freitas, N Moreira, Ana Margarida Araujo, Frank S S Rogerson, I Vasconcelos, Paula Guedes De PinhoAbstract:Abstract A method based on headspace solid-phase microextraction (HS-SPME) coupled to gas chromatography-triple quadrupole/mass spectrometry detection (GC-TQ/MS) with a prior derivatization step with O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine hydrochloride (PFBHA) was developed to quantify Carbonyl Compounds in different categories of Port wines. Optimal extraction conditions were obtained incubating 2 ml of wine with 2.3 g/l of PFBHA for 10 min and extracted during 20 min at 32 °C. The method was validated for 38 Carbonyl Compounds (alkanals, alkenals, Strecker aldehydes, dialdehydes, ketones and furan aldehydes) with regard to linearity, repeatability, inter and intra-day precision and accuracy, showing that the method is suitable for the determination of Carbonyl Compounds in wines. Tawny wines with ‘indication of age’ (10–40 years old) presented the highest levels of some Carbonyl Compounds, such as propanal, pentanal, hexanal, Strecker aldehydes, diacetyl, methyl glyoxal, 3-pentanone and 2-furfural, whereas Ruby wines were characterized by the highest amounts of some unidentified Compounds.
Paula Guedes De Pinho - One of the best experts on this subject based on the ideXlab platform.
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development and optimization of a hs spme gc ms methodology to quantify volatile Carbonyl Compounds in port wines
Food Chemistry, 2019Co-Authors: Victor De Freitas, N Moreira, Ana Margarida Araujo, Frank S S Rogerson, I Vasconcelos, Paula Guedes De PinhoAbstract:Abstract A method based on headspace solid-phase microextraction (HS-SPME) coupled to gas chromatography-triple quadrupole/mass spectrometry detection (GC-TQ/MS) with a prior derivatization step with O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine hydrochloride (PFBHA) was developed to quantify Carbonyl Compounds in different categories of Port wines. Optimal extraction conditions were obtained incubating 2 ml of wine with 2.3 g/l of PFBHA for 10 min and extracted during 20 min at 32 °C. The method was validated for 38 Carbonyl Compounds (alkanals, alkenals, Strecker aldehydes, dialdehydes, ketones and furan aldehydes) with regard to linearity, repeatability, inter and intra-day precision and accuracy, showing that the method is suitable for the determination of Carbonyl Compounds in wines. Tawny wines with ‘indication of age’ (10–40 years old) presented the highest levels of some Carbonyl Compounds, such as propanal, pentanal, hexanal, Strecker aldehydes, diacetyl, methyl glyoxal, 3-pentanone and 2-furfural, whereas Ruby wines were characterized by the highest amounts of some unidentified Compounds.
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Development and optimization of a HS-SPME-GC-MS methodology to quantify volatile Carbonyl Compounds in Port wines
'Elsevier BV', 2019Co-Authors: Moreira Nathalie, Victor De Freitas, Araújo, Ana Margarida, Rogerson Frank, Vasconcelos Isabel, Paula Guedes De PinhoAbstract:A method based on headspace solid-phase microextraction (HS-SPME) coupled to gas chromatography-triple quadrupole/mass spectrometry detection (GC-TQ/MS) with a prior derivatization step with O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine hydrochloride (PFBHA) was developed to quantify Carbonyl Compounds in different categories of Port wines. Optimal extraction conditions were obtained incubating 2 ml of wine with 2.3 g/l of PFBHA for 10 min and extracted during 20 min at 32 °C. The method was validated for 38 Carbonyl Compounds (alkanals, alkenals, Strecker aldehydes, dialdehydes, ketones and furan aldehydes) with regard to linearity, repeatability, inter and intra-day precision and accuracy, showing that the method is suitable for the determination of Carbonyl Compounds in wines. Tawny wines with ‘indication of age’ (10–40 years old) presented the highest levels of some Carbonyl Compounds, such as propanal, pentanal, hexanal, Strecker aldehydes, diacetyl, methyl glyoxal, 3-pentanone and 2-furfural, whereas Ruby wines were characterized by the highest amounts of some unidentified Compounds.info:eu-repo/semantics/publishedVersio
Manas K Basu - One of the best experts on this subject based on the ideXlab platform.
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a new molecular iodine catalyzed acetalization of Carbonyl Compounds
Synlett, 2002Co-Authors: Manas K Basu, Susanta Samajdar, Frederick F Becker, Bimal K. BanikAbstract:A new and facile molecular iodine-catalyzed acetalization of Carbonyl Compounds has been developed. Useful selectivity has also been demonstrated.
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a new molecular iodine catalyzed thioketalization of Carbonyl Compounds selectivity and scope
Tetrahedron Letters, 2001Co-Authors: Susanta Samajdar, Manas K Basu, Frederick F Becker, Bimal K. BanikAbstract:Abstract A new molecular iodine-catalyzed thioketalization of Carbonyl Compounds has been developed.
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samarium mediated barbier reaction of Carbonyl Compounds
Tetrahedron Letters, 2001Co-Authors: Manas K Basu, Bimal K. BanikAbstract:Abstract Samarium metal in the presence of catalytic amounts of iodine was found to be effective for the Barbier reaction of Carbonyl Compounds.
Susanta Samajdar - One of the best experts on this subject based on the ideXlab platform.
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samarium n bromosuccinimide induced reductive dimerization of Carbonyl Compounds
Tetrahedron Letters, 2005Co-Authors: Bimal K. Banik, Susanta Samajdar, Indrani Banik, Rogelio CuellarAbstract:Stereoselective reductive coupling of Carbonyl Compounds has been achieved using samarium/N-bromosuccinimide in methanol. The combination of these agents has proved a powerful addition to the arsenal of samarium-based reductants currently utilized.
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a new molecular iodine catalyzed acetalization of Carbonyl Compounds
Synlett, 2002Co-Authors: Manas K Basu, Susanta Samajdar, Frederick F Becker, Bimal K. BanikAbstract:A new and facile molecular iodine-catalyzed acetalization of Carbonyl Compounds has been developed. Useful selectivity has also been demonstrated.
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a new molecular iodine catalyzed thioketalization of Carbonyl Compounds selectivity and scope
Tetrahedron Letters, 2001Co-Authors: Susanta Samajdar, Manas K Basu, Frederick F Becker, Bimal K. BanikAbstract:Abstract A new molecular iodine-catalyzed thioketalization of Carbonyl Compounds has been developed.
